ACS Applied Materials & Interfaces
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2022
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IF 10.383
Hongliang Ma,Xia Li,Jiang Lou,Yujie Gu,Yang Zhang,Yifei Jiang,Heli Cheng,Wenjia Han
Humidity sensors have been widely used for humidity monitoring in industry and agriculture fields. However, the rigid structure, nondegradability, and large dimension of traditional humidity sensors significantly restrict their applications in wearable fields. In this study, a flexible, strong, and eco-friendly bacterial cellulose-based humidity sensor (BPS) was fabricated using a two-step method, involving solvent evaporation-induced self-assembly and electrolyte permeation. Rapid evaporation of organic solvent induces the formation of nanopores of the bacterial cellulose (BC) surface and promotes structural densification. Furthermore, the successful embedding of potassium hydroxide into the sophisticated network of BC effectively enhanced the sensing performance of BPS. The BPS exhibits an excellent humidity sensing response of more than 103 within the relative humidity ranging from 36.4 to 93% and strong (66.4 MPa) and high flexibility properties owing to the ultrafine fiber network and abundant hydrophilic functional groups of BC. Besides being strong and thin, BPS is also highly flexible, biodegradable, and humidity-sensitive, making it a potential candidate in wearable electronics, human health monitoring, and noncontact switching.
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CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Danning Fu,Ruibin Wang,Yang Wang,Qianyu Sun,Chen Cheng,Xiaohui Guo,Rendang Yang
To date, flexible pressure sensors built on silver nanowires (AgNWs) have attracted tremendous attention, owing to their versatile applications in wearable, human-interactive, health-monitoring devices. Cellulose and its derivatives, which show great promise in serving flexible pressure sensors as the desired substrate due to their natural abundance, biocompatibility, easy processibility, and low costs. Herein, we reported a rational strategy to design a silver nanowires-dual-cellulose conductive paper. Its morphology, chemical and crystal structures, thermal stability , mechanical performances, and electrical properties were carefully studied. The results suggested that good tensile properties (tensile strength ≤8.10 MPa), high electrical conductivity (≤ 1.74 × 10 4 S·m −1 ) with long-term stability, and good adhesion stability (bending cycles over 500) were obtained. Furthermore, the use of such conductive paper as substrate for versatile flexible pressure sensors was demonstrated, which exhibited fast response (~ 0.48 s) and high sensitivity, in response to finger motion, voice recognition, and human pulse, etc.
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Catalysts
·
2022
·Vol. 12
·期 1
·83
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IF 4.501
Cuiping Yu,Weilong Wu,Min Gao,Yu Liu
Asymmetric catalysis is the preferred method for the synthesis of pure chiral molecules in the fine chemical industry. Cellulose has long been sought as a support in enantioselective catalysis. Dialdehyde cellulose (DAC) is produced by the selective oxidation of cellulose and is used to bind 5,5′-diamino Binap by forming a Schiff base. Here, we report the synthesis of modified cellulose-supported Rh as a novel biomass-supported catalyst and the characterization of its morphology, composition, and thermal stability. DAC-BINAP-Rh was a very effective catalyst in the asymmetric hydrogenation of enamides and could be easily recycled. This work provides a novel supported catalyst that broadens the applications of cellulose in asymmetric catalysis.Keywords:asymmetric hydrogenation;cellulose;BINAP;heterogeneous catalysis
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CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Shuanglin Wu,Jiayi Shi,Xiaolin Nie,Zhifeng Yu,Fenglin Huang
High-energy density lithium sulfur battery containing highly active materials is more prone to safety hazards. Besides, the infamous shuttle effect of lithium polysulfides (LiPSs) and listless redox kinetic limit its practical applications. Here, a “one-for-all” design concept for separator enabled by interfacial engineering is proposed to relieve the bottlenecks. For one thing, porous bacterial cellulose (PBC) membrane with high thermostability (no shrinking at 200 °C) and puncture resistance was employed to ensure the battery's safety. For another, a difunctional Ti 3 C 2 T x -SnS 2 modified layer could capture LiPSs through lewis-acid interaction and promoted the redox kinetics by catalytically active sites. The symmetric cell with anchoring-electrocatalysis Ti 3 C 2 T x -SnS 2 -PBC separator infiltrated with the electrolyte delivered an ionic conductivity of 2.171 mS/cm at a high temperature of 180 °C. And a capacity retention is improved by 71.2% compared with PP separator. This work furnishes a facial engineering strategy for manufacturing a multifunctional separator for lithium sulfur batteries.
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CARBOHYDRATE POLYMERS
·
2022
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IF 10.723
Xi Chen,Yong Huang,Lijiaqi Zhang,Jinfeng Liu,Chao Wang,Min Wu
It is challenging to build a superhydrophobic coating with aqueous dispersions since hydrophobic substances are usually dispersed in pure organic or water/organic mixed solvents. In this study, hydrophobic SiO 2 nanoparticles were dispersed in water assisted with cellulose nanofiber (CNF) and the superhydrophobic surface was manufactured by coating a waterborne dispersion composed of CNF, hydrophobic SiO 2 nanoparticles and methyltrimethoxysilane (MTMS). It was found that the dispersion of SiO 2 in water can be improved by CNF. Meanwhile, the coated paper surface retained its hydrophobicity after 10 abrasion cycles due to the adhesion of the coating surface promoted by MTMS. When SiO 2 content over 0.25 wt%, the coated paper surface displayed a superhydrophobic property, and the moisture absorption decreased to 31–34%. The contact angle of the coating surface was 162°, the contact angle hysteresis was 1.96° and the rolling contact angle was 1.33° when SiO 2 content was 1 wt%.
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CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Wenting Zhang,Yuankun Wang,Defeng Wu
Discriminating the roles of different networks in the multiply cross-linked hydrogels is vital to optimize their overall performance. Poly(vinyl alcohol)/cellulose nanofiber composite hydrogels were used as template for the study. Three types of characteristic networks, including chemical network cross-linked with boronic ester bonds, physical network cross-linked with microcrystallites , and coexistence of these two networks, were constructed in the system, and the viscoelastic responses were used to detect the characteristic relaxation behavior of those networks. The physical network is more sensitive to stress-induced deformation, whereas the chemical network more sensitive to strain-induced one. The former has lower level of viscous dissipation and higher level of elastic storage as compared to the latter, and dominates linear viscoelasticity of hydrogels as the two networks coexist. Their synergistic effect can be well defined by the scaling behavior of hysteretic work. This work proposes an interesting method of probing networks in the multiply cross-linked hydrogels.
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ACS Applied Materials & Interfaces
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2022
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IF 10.383
Qianqian Liang,Dong Zhang,Yuchen Wu,Shiyan Chen,Zhiliang Han,Baoxiu Wang,Huaping Wang
Liquid sensors for detecting water and body fluids are crucial in daily water usage and health monitoring, but it is challenging to combine sensing performance with high tensile deformation and multifunctional applications. Here, a substrate-free, self-stretchable bacterial cellulose (BC)/carbon nanotube (CNT) helical fiber liquid sensor was prepared by the solution spinning and coiling process using BC as the water-sensitive matrix and CNTs as the active sensing materials. The BC/CNT (BCT) fiber sensor has a high stretch ratio of more than 1000% and a rapid response for a current change rate of 104% within 1 s, which is almost unaffected under washing and various stretching or knotting deformations. By combination of the BCT fiber, we can design smart diapers or water level detectors, which rapidly monitor the status of smart diapers or water level, and the monitoring result can be transferred on time through an alarm device or smartphone. In short, the scalable and continuous preparation of the self-stretchable BCT helical fiber will provide a capacious platform for the development of a wearable sensor applied in daily life (such as smart diapers, water level detection, etc.)
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Biofuels Bioproducts & Biorefining-Biofpr
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2022
·Vol. 17
·期 2
·355-362
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IF 5.239
Yanqian Gu,Shasha Liu,Gang Wu,Yinlong Wu,Shoujun Zhang,Yong Huang,Shu Zhang,Hong Zhang
Biomass is the sole carbon-containing renewable resource on Earth, and has high potential for the production of platform chemicals. Phenol, one of the most important platform chemicals, is generally derived from lignin conversion. In this study, the production of phenol from co-pyrolysis of cellulose and sodium borohydride at different mass ratios is investigated in detail. The results show that even a small amount of sodium borohydride (cellulose–sodium borohydride = 10:1) could effectively promote the conversion of cellulose to phenol through cellulose-derived levoglucosan intermediates. As the mass ratio of cellulose–sodium borohydride decreased, the relative content of phenol in the products significantly increased, and could be as high as 11.0% when the ratio of cellulose to sodium borohydride was 2:1. Glycosidic bonds in cellulose were considered to play an important role in its catalytic conversion. Furthermore, the resulting solid product could be used as a B-doping carbon material, which is desirable in various research fields. This study provided a novel method for the highly efficient utilization of cellulose. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.
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Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Jianming Wu,Zihui Dong,Xiuping Li,Peng Li,Jiedong Wei,Mei Hu,Lihong Geng,Xiangfang Peng
Facing the serious environmental problem caused by water pollution , it is still challenging to develop a kind of acidic wastewater treatment adsorbent with high adsorption efficiency. In this study, the negative charged cellulose nanofibrils (CNF) were used to enhance the acid-resistance of the positive charged chitosan (CTS) via both ionic and hydrogen-bonding crosslinking interactions. The prepared CTS/CNF composite membrane presented an excellent acid-resistant property (approximately 95% acid-resistant degree) and 14.71 mg/g of adsorption capacity for methylene blue in the strong acidic environment (pH = 1.22), surpassing almost reported adsorbents. Besides, the adsorption process for methylene blue conformed to the pseudo-first-order kinetic model and the Langmuir isotherm model better. Furthermore, the obtained CTS/CNF composite membrane presented excellent recyclability (about 85% desorption rate) after five recycles of adsorption-desorption. Consequently, as a novel and efficient adsorbent, the CTS/CNF composite membrane showed an outstanding application potential in the treatment of acidic wastewater.
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RSC Advances
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2022
·Vol. 12
·期 42
·27616-27624
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IF 4.036
Dandan Xie,Qiuxia Fu,Yue Wang,Jianlong Ge,Hailou Wang,Yu Zhang,Wei Zhang,Haoru Shan
Fabricating dye adsorbents with efficient adsorption properties is of great significance in the treatment of printing and dyeing wastewater. Herein, composite materials of polydopamine decorated cellulose fibrous nonwovens (PDA@CF NWs) were fabricated by constructing a PDA functional layer on the surface of cellulose fibers via in situ polymerization. In addition, a three-dimensional adsorbent of 3D PDA@CF NWs with good hydrophilicity, structural stability, and compression resistance could be obtained using a facilely laminating and traditional loop bonding reinforcing technique. Attributed to the efficient and uniform loading of an active PDA functional layer, the resulting PDA@CF NWs exhibited a relatively large adsorption capacity of around 91 mg g−1 towards the template dye of methylene blue within a fast equilibrium time of 2 h, which was superior to most of the fibrous adsorbents. In addition, the treatment column of 3D PDA@CF NWs exhibited a breakthrough capacity of 40.9 mg g−1, reaching nearly 50% of the static saturated dye-binding capacity. More importantly, the 3D PDA@CF NWs column could effectively and continuously separate the mixture of different dyes under gravity, highlighting an excellent practical performance. Thus, the PDA@CF NWs are expected to provide a promising candidate for environment-friendly, large-scale and efficient treatment of industrial printing and dyeing wastewater.
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EUROPEAN POLYMER JOURNAL
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2022
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IF 5.546
Hu-Wei Lv,Hong-Liu Jiang,Fu-An He,Qing-Di Hu,Zhu-Rui Zhong,Yong-Yu Yang
A novel crosslinked cellulose-tetrafluoroterephthalonitrile-tannin (CETTA) polymer with the excellent adsorption performance for both cationic and anionic dyes was synthesized by a one-step reaction, and its structure was investigated by SEM, FTIR, TGA, XPS, and zeta potential measurement. It was found that the adsorption ability of the CETTA changed with the pH value of the dye solution because the electrostatic interaction played an important role in the dye adsorption process. The maximum adsorption capacities of the CETTA at 303 K for the cationic methylene blue (MB) and the anionic xylenol orange (XO) dye reached as high as 953 mg/g at pH = 10 and 232 mg/g at pH = 1, respectively. The adsorption behaviors of the CETTA for both the MB and the XO were not only spontaneous but also in accordance with the pseudo-secondary adsorption kinetic model and the linear Langmuir adsorption isotherm model. Additionally, the CETTA possessed the good reused ability for the dye adsorption.
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ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Lei Zhang,Jingyu Wang,Renliang Huang,Mei Cui,Wei Qi,Zhimin He,Rongxin Su
Cellulose nanocrystals (CNCs) are renewable and multifunctional plant-based nanoparticles that are industrially produced by controlled sulfuric acid hydrolysis, resulting in a large amount of acid–sugar mixture, which has potential to be recovered and concentrated for reuse. However, the removal of sugar from the acid–sugar mixture, which was produced by cellulose biomass hydrolysis, is essential before acid recycling. In this study, the acid–sugar mixture was separated from the CNC hydrolysate, and then, a combination process of diffusion dialysis (DD) using anion-exchange membranes and electrodialysis (ED) was used to remove the sugar from the acid–sugar mixture. The operation parameters were optimized and Fenton oxidation (FO) was applied to degrade sugar with a decrease in the chemical oxygen demand (CODCr) in the wastewater. As a result, 98.8% sulfuric acid was totally recovered in a practical process, with 92.2% recovery by diffusion dialysis and 87.1% by electrodialysis, and more than 90% sugar was rejected. CODCr in the wastewater decreased to <500 mg/L by FO treatment. Furthermore, CNCs prepared with the recovered sulfuric acid showed a crystallinity, surface charge, and morphology similar to that prepared with fresh acid. Therefore, this combination process of DD and ED is a green and economic feasible way for acid recycling for sustainable CNC production.
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